| """ | |
| ================================================= | |
| Animated image using a precomputed list of images | |
| ================================================= | |
| Output generated via `matplotlib.animation.Animation.to_jshtml`. | |
| """ | |
| import matplotlib.pyplot as plt | |
| import numpy as np | |
| import matplotlib.animation as animation | |
| fig, ax = plt.subplots() | |
| def f(x, y): | |
| return np.sin(x) + np.cos(y) | |
| x = np.linspace(0, 2 * np.pi, 120) | |
| y = np.linspace(0, 2 * np.pi, 100).reshape(-1, 1) | |
| # ims is a list of lists, each row is a list of artists to draw in the | |
| # current frame; here we are just animating one artist, the image, in | |
| # each frame | |
| ims = [] | |
| for i in range(60): | |
| x += np.pi / 15 | |
| y += np.pi / 30 | |
| im = ax.imshow(f(x, y), animated=True) | |
| if i == 0: | |
| ax.imshow(f(x, y)) # show an initial one first | |
| ims.append([im]) | |
| ani = animation.ArtistAnimation(fig, ims, interval=50, blit=True, | |
| repeat_delay=1000) | |
| # To save the animation, use e.g. | |
| # | |
| # ani.save("movie.mp4") | |
| # | |
| # or | |
| # | |
| # writer = animation.FFMpegWriter( | |
| # fps=15, metadata=dict(artist='Me'), bitrate=1800) | |
| # ani.save("movie.mp4", writer=writer) | |
| plt.show() | |